Registration Dossier
Registration Dossier
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EC number: 812-656-2 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Fatty acids, C16-18 (even numbered) and C16-18unsatd. (even numbered), mono-, diesters with neopentyl glycol and di-, triesters with trimethylolpropane (CAS 85186-92-1) is readily biodegradable according to OECD criteria.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Since no studies investigating the ready biodegradability of fatty acids, C16-18 (even numbered) and C16-18unsatd. (even numbered), mono-, diesters with neopentyl glycol and di-, triesters with trimethylolpropane (CAS 85186-92-1) are available for this endpoint, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 read across to structurally related category members was conducted. The read-across substances are representative to evaluate the biodegradation of fatty acids, C16-18 (even numbered) and C16-18unsatd. (even numbered), mono-, diesters with neopentyl glycol and di-, triesters with trimethylolpropane (CAS 85186-92-1) since they have a similar structure and thus cover the target substance adequately. Further justification is given within the endpoint summary 6.1 and within the category justification section 13.
A study performed according to OECD 301F (Manometric Respirometry), investigating the ready biodegradability of fatty acids, C16-18 (even numbered) and C16-18-unsatd. (even numbered), triesters with trimethylolpropane (CAS 68002-79-9) is available (Börner, 2000). A degradation of 86% within 28 days was observed and the 10-day window was fulfilled. In conclusion, the test substance is readily biodegradable according to OECD criteria.
A study investigating the ready biodegradability of Fatty acids, C16-18 and C18-unsatd., triesters with trimethylolpropane (CAS 68002-78-8) is available. The study was conducted according to OECD guideline 301 B (Bouillon, 2012). The substance was incubated under aerobic conditions with domestic activated sludge for 28 days. Based on the CO2 production of the inoculum a degradation rate of 86.6% was determined at test termination. Therefore the substance can be considered as readily biodegradable according to OECD criteria.
A Guideline study on the ready biodegradability of 2-ethyl-2-(((1-oxoisooctadecyl)oxy)methyl)-1,3-propanediyl bis (isooctadecanoate) (CAS 68541-50-4) is available. The study followed OECD guideline 301B using domestic activated sludge as inoculum (Oggier, 2011). The degradation rate was determined by measuring the CO2 evolution of the inoculum. After 28 days of incubation a degradation rate of 91% was determined. Thus the substance is regarded as readily biodegradable according to OECD criteria.
Based on the result from structurally related read-across substances (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5) which are characterized by a similar ecotoxicological profile and comparable structure, it can be concluded that fatty acids, C16-18 (even numbered) and C16-18unsatd. (even numbered), mono-, diesters with neopentyl glycol and di-, triesters with trimethylolpropane (CAS 85186-92-1) is readily biodegradable.
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